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20
TROUBLESHOOTING
Fig. 42 shows the LED display panel on the indoor unit. See Table 5 for a summary of display indicators. Table 6 lists problems, possible
causes, and possible solutions.
Fig. 42 —LED Display Panel
Table 5 — Display Indicators
TYPE
DIGITAL DISPLAY
MODE/STATUS
[NO ERROR]
Setting Temperature
Starting
“--”
Shutdown
“--”
Standby
“--”
Timing ON
“--”
Timing OFF
Setting Temperature
System Defrost ON
Setting Temperature
System Defrost OFF
Room Temperature
Only Fan
ERROR
dd
Heating / Cooling Mode Conflict Error
E1
Communication Error Between Indoor and Outdoor Unit
E2
Check Indoor Temperature Sensor (T1)
E4
Check Evaporator Outlet Temperature Sensor (T2B)
E5
Check Evaporator Temperature Sensor (T2A)
E6
Check DC Fan
E7
EEPROM Error (Data Storage)
E9
Communication Error Between Indoor Unit and Wired Controller.
Eb
EEV Error
Ed
Outdoor Unit Error
EE
Condensate Overflow
FE
No Address When Powered ON For First Time
UU
MDC In Auto System-Check Mode.
LEGEND:
ACB
— Auxiliary Control Board
EEPROM
— Electronically Erasable Programmable Read-only Memory
EEV
— Electronic Expansion Valve
MDC
— Multiport Distribution Controller
A40-1716
OPERATION
TIMER
DEF./FAN
ALARM
a40-1842